Pressure plate instrument capable of directly measuring volume change of soil sample

A volume change, soil sample technology, applied in the direction of volume measurement instruments/methods, instruments, measuring devices, etc., can solve problems such as the inability to accurately calculate the volumetric moisture content of the soil sample, and the inability to measure the volume change of the soil sample.

Inactive Publication Date: 2011-10-19
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is: in order to solve the problem that the current volume pressure plate instrument for measuring the soil-water characteristic curve of the soil sample cannot measure the volume change of the soil sample with the increase of the suction force during the test, so that the water content of the soil sample volume cannot be accurately calculated. Insufficient efficiency, the present invention provides a volume pressure plate instrument device that can directly measure the volume change of the soil sample, which can easily measure the volume change of the soil sample during the test process, and can accurately calculate the volume change and Strain, and volumetric moisture content, making the test results more accurate

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  • Pressure plate instrument capable of directly measuring volume change of soil sample
  • Pressure plate instrument capable of directly measuring volume change of soil sample
  • Pressure plate instrument capable of directly measuring volume change of soil sample

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Embodiment Construction

[0012] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. figure 1 It is a diagram of a pressure plate apparatus that can directly measure volume change using a cylindrical pressure vessel in the present invention. Before the test, the soil sample 6 used is properly treated and the necessary soil parameters are measured.

[0013] When the soil-water characteristic curve of the soil sample 6 needs to be measured, first, according to the properties and test requirements of the soil sample 6, select a ceramic plate 11 with a high air intake value of suitable specifications and a horizontal displacement sensor 7 and a vertical displacement sensor 8 with suitable measuring ranges. The high air intake value ceramic plate 11 is installed on the base 12, saturated according to an appropriate method, and then put into the pressure vessel 1, and the drain hole 14 on the base 12 is connected to the drain ...

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Abstract

The invention discloses a pressure plate instrument capable of directly measuring the volume change of a soil sample. The instrument consists of a pressure container, a horizontal displacement sensor, a vertical displacement sensor, a sensor bracket, a high air inlet value ceramic plate, a base, the soil sample, a drainage volume measuring device and an upper cover of the pressure container, wherein the drainage volume of the soil sample can be measured by the drainage volume measuring device; the horizontal displacement sensor and the vertical displacement sensor which are arranged on the sensor bracket can be used for measuring the deformation of the soil sample in horizontal and vertical directions in the testing process; and the volume and volume strain of the soil sample can be accurately calculated through the deformation value of the soil sample in horizontal and vertical directions.

Description

[0001] technical field [0002] The invention relates to a pressure plate meter device which can directly measure the volume change of soil samples in soil mechanics and foundation engineering. Background technique [0003] The soil-water characteristic curve of soil, also known as the moisture characteristic curve, is the relationship curve between the matric suction of unsaturated soil and the gravitational water content, volumetric water content, saturation or effective saturation. The soil-water characteristic curve is related to factors such as soil structure, soil particle composition, and pore size distribution, and reflects the soil's ability to hold water. It plays an important role in the study of unsaturated soil mechanics. According to the soil-water characteristic curve, the strength of unsaturated soil can be determined, the volume strain and permeability coefficient of unsaturated soil can be calculated, and it can also be used to estimate the distribution of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F17/00G01N33/24
Inventor 郭爱国孔令伟孙志亮曹豪荣刘观仕
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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